Display screen or portion thereof, or pair of display screens or portions thereof, with transitional graphical user interface



FIG. 1 is the first image in a sequence of a pair of display screens or portions thereof with transitional graphical user interface showing our new design according to a first embodiment;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof;

FIG. 6 is the first image in a sequence of a display screen or portion thereof with transitional graphical user interface showing our new design according to a second embodiment;

FIG. 7 is the second image thereof;

FIG. 8 is the third image thereof;

FIG. 9 is the fourth image thereof; and,

FIG. 10 is the fifth image thereof.

The outermost broken line rounded rectangles in the upper and lower portions of FIGS. 1-5 illustrate two separate display screens or portions thereof and form no part of the claimed design. The outermost broken line rounded rectangle in FIGS. 6-10 illustrates a single display screen or portion thereof and forms no part of the claimed design. The remaining dashed broken lines in the drawings illustrate portions of the graphical user interface that form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-5 and 6-10, respectively. The process or period in which one image transitions into another image forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof, or pair of display screens or portions thereof, with transitional graphical user interface, as shown and described. 